Price Charting - Daily updated video game prices for almost every era.

DigitPress - A wonderful source for determining loose cart rarity. It isn't perfect, but it's the best you're going to find.

Video Game Console Library - A comprehensive guide to video game consoles that are obscure, popular, new, and old. It is run by a team of passionate people dedicated to informative content and accuracy.

Console Colors This website lists almost all the color variations of retro consoles including rarity, quantity as well as other important info.

I've been using videogameboxprotectors.com, as have many others, for the longest time and am pretty happy with their products. I've been recently looking for some more obscure box protectors and stumbled upon retroprotection as another source for box protectors. I ordered up a Skyward Sword box protector and sure enough the quality is pretty darn decent. Before I go ordering up more protectors (3DS XL console boxes, Starfox, etc.) I wanted to see if anyone else had any experience with them or made any direct comparisons.

I ordered console boxes for the GBA and GBC. The GBA fit really well but the GBC was a little too large, but functional. I also got an original Game Boy console box protector which fit very well. I plan on getting some GBA game box protectors and N64 game box protectors in the near future from him.